You should confirm that your computer has the correct software
installed and that the environment variables are set before you start working
To check the Derby system
Verify that the java executable file, version 1.4.2 or,
higher is in your command execution PATH by opening a command window and running
the java -version command. The output from
the command looks something like this:
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) Client VM (build 19.1-b02, mixed mode, sharing)
output you see might be different from what is shown here because the java
-version command outputs vendor-specific information. If the command
produces an error or the version listed is not 1.4 or higher, install a JDK
Verify that the DERBY_HOME
environment variable is set and points to the root directory of the Derby10.8 installation. Open
a command window and run the appropriate command for your system. If
you installed Derby in
the /opt/Derby_10 directory
on UNIX or the c:\Derby_10 directory
on Windows, the command that you use and the expected output are shown in
the following table.
Table 1. Verifying the
UNIX (Korn Shell)
If you receive an error or do not see the expected
output, ensure that you have set the DERBY_HOME environment
variable, as described in Setting the environment variables.
Note: You can also use the sysinfo utility to verify
that the environment variables are set correctly. If the environment variables
are set correctly, the sysinfo command displays information
about your Java virtual machine (JVM) and the version of Derby that
you have installed.